Nasstoys of New York The Macho Collection Macho Snap On Vibro Cock and Ball Strap. The vibro snap-on cock & ball strap has a bullet attached for powerful stimulationSecure, adjustable snaps. Powerful single speed bullet included. Prolongs and strengthens erections. Adjustable for men of all sizes. Phthalates free, RoHS compliant materials: strap PVC, ABS plastic bullet vibrator. Vibrating ring requires 3 LR44 batteries, included.